Effects of insulin-like growth factor II (IGFII) genotypes on the carcass characteristics of Darag native chickens
2023
Ortiguero, Ma.C.G. | Bermudez, K.A.P. | Bautista, H.N.F. | Bautista, N.H.F. | Estrella, C.A.S. | Magpantay, V.A.
Insulin-like growth factor-II (IGF-Il) plays a critical role in the regulation of cell proliferation and development in various tissues. Genetic variations within this gene may impact its expression and activity, thereby affecting muscle growth and overall carcass characteristics in chickens. This study explored the effect of IGF-II genotypes and sex on the carcass characteristics of Darag native chickens (n=13) at 14 weeks of age. Variables measured include weight at slaughter, bled and dressed weights, weight of internal organs and weight and length of the gastrointestinal tract. Chickens with the CC genotype (0.14+-0.01 g) displayed the smallest liver relative to the overall weight of the internal organ, indicating an efficient liver performance in these chickens. Additionally, chickens with the CG genotype (12.94+-0.46cm) tend (P0.10) to have longer cecum than those with TC genotype (10.65+-0.71cm). Meanwhile, Darag males exhibited heavier head, shanks, esophagus, total internal organs, duodenum, jejunum, and ileum compared to their female counterparts.Investigating the influence of IGF-ll genotypes and sex on the carcass characteristics can provide valuable insights for poultry breeding and production practices of Darag chickens.
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